"Wackadoodle" is a fun and playful way to describe someone who is eccentric or a bit crazy. However, if you want to switch up your vocabulary and expand your word choices, there are various synonyms that you can use. Some of the alternatives for "wackadoodle" include "quirky," "offbeat," "unusual," "eccentric," "kooky," "zany," "funky," "weird," "oddball," "idiosyncratic," and "off-the-wall." These synonyms can convey the same playful tone as "wackadoodle," but with a touch of sophistication that can make your writing or conversation stand out. So, pick the synonym that best suits your context and impress your audience with your linguistic skills.